Evaluation of nitrate source in groundwater of southern part of North China Plain based on multi-isotope  

作　　者：方晶晶 周爱国 马传明 刘存富 蔡鹤生 甘义群 刘运德 

机构地区：[1]School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences

出　　处：《Journal of Central South University》2015年第2期610-618,共9页中南大学学报（英文版）

基　　金：Projects(41072179,41002083)supported by the National Natural Science Foundation of China

摘　　要：Nitrate pollution in groundwater is a serious water quality problem that increases the risk of developing various cancers.Groundwater is the most important water resource and supports a population of 5 million in Anyang area of the southern part of the North China Plain. Determining the source of nitrate pollution is the challenge in hydrology area due to the complex processes of migration and transformation. A new method is presented to determine the source of nitrogen pollution by combining the composition characteristics of stable carbon isotope in dissolved organic carbon in groundwater. The source of groundwater nitrate is dominated by agricultural fertilizers, as well as manure and wastewater. Mineralization, nitrification and mixing processes occur in the groundwater recharge area, whereas the confined groundwater area is dominated by denitrification processes.Nitrate pollution in groundwater is a serious water quality problem that increases the risk of developing various cancers.Groundwater is the most important water resource and supports a population of 5 million in Anyang area of the southern part of the North China Plain. Determining the source of nitrate pollution is the challenge in hydrology area due to the complex processes of migration and transformation. A new method is presented to determine the source of nitrogen pollution by combining the composition characteristics of stable carbon isotope in dissolved organic carbon in groundwater. The source of groundwater nitrate is dominated by agricultural fertilizers, as well as manure and wastewater. Mineralization, nitrification and mixing processes occur in the groundwater recharge area, whereas the confined groundwater area is dominated by denitrification processes.

关 键 词：δ^12NNO3 δ^18ONO3 δ^13CDOC esophageal cancer GROUNDWATER 

分 类 号：X523[环境科学与工程—环境工程]